Photography device with anti-shake function

ABSTRACT

A photography device with anti-shake function for sensing camera shake and moving a lens toward a direction to correct the camera shake when photographing an object so that the object may be clearly photographed. A coil and a magnet are included in the invention, and the coil moves in a direction perpendicular to the optical-axis of the lens as a result of magnetic fields generated by the magnet and the coil when electric power is applied to the coil.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a photography device with anti-shakefunction, and more particularly, to a photography device which sensesshake of the photography device and moves lens in a direction correctingthe shake to thereby allow an object to be clearly photographed.

2. Description of the Prior Art

In recent, compact electronic devices including a communication devicesuch as a cellular phone are equipped with a compact photography devicefor photographing an image. These photography devices are characterizedby compact and simple structure.

These photography devices includes a lens group consisting of aplurality of lenses and an image pickup device which converts opticalsignals transmitted through the lens group into electric signals.

However, when a user's hand grasping the electronic device equipped withthe photography device is shaken or vibration is transferred to theelectronic device by another external factor, the vibration istransferred to the photography device and thus the image of an object isblurred.

A support is required to photograph a clear image Due to this problem,but is hardly used since it is uncomfortable to be carried.

Therefore, deterioration in an image due to shake is inevitable for thegeneral photography device for electronic devices.

SUMMARY OF THE INVENTION

Embodiments of the present invention are directed to a photographydevice which senses shake of the photography device upon photographingof an object and moves lens in a direction correcting the shake tothereby allow the object to be clearly photographed.

In one embodiment, a photography device with anti-shake functionincludes: a lens unit having a lens; a coil placed in an outside of thelens unit; a magnet disposed adjacently to an outside of the coil; aniron piece having one end which is in contact with the magnet and theother end which is inserted in the coil; a control unit for controllingpower supplied to the coil, wherein the iron piece makes a magneticfield generated in the magnet parallel to a magnetic field generated inthe coil to move the coil in a direction perpendicular to an opticalaxial direction of the lens.

The magnet is mounted to upper and lower ends of the iron piece,respectively, and the polarities on sides in contact with the iron pieceare the same.

The coil is wound around the iron piece.

The photography device further includes: a support member disposed belowthe lens unit; and a first elastic member having one end connected withthe support member and the other end connected with the lens unit andelastically supporting the lens unit so that the lens unit can move inthe direction perpendicular to the optical axial direction of the lens,wherein the first elastic member is connected with the control unit andthe coil to transfer the power applied from the control unit to thecoil.

The photography device further includes: a power terminal having one endconnected with the control unit and the other end connected with thelens unit and transferring the power to the lens unit, wherein the powerterminal includes a first extension part formed parallel to one surfaceof the lens unit; and a second extension unit bent from the firstextension part.

The lens unit includes a second elastic member which elasticallysupports the lens in the optical axial direction, and the power terminalis connected integrally with the second elastic member.

The photography device further includes: a sensing means for sensingmovement of the lens unit, which includes a first sensor disposed to oneside of the lens unit to measure a moving distance of the lens unit in afirst direction; and a second sensor disposed in the opposite side tothe one side of the lens unit to measure the moving distance of the lensunit in the first direction, wherein the control unit controls themoving distance of the lens in the first direction using a valueobtained by dividing a difference between the measured value of thefirst sensor and the measured value of the second sensor by sum of themeasured value of the first sensor and the measured value of the secondsensor.

The photography device further includes: a drive member fixed with thelens unit in an inside thereof and fixed with the coil in an outsidethereof, wherein the drive member is formed with a reflection plateformed so as to face with the first sensor and the second sensor toreflect signals of the first sensor and the second sensor.

The reflection plate is projected from the drive member parallel to thefirst or second sensor in a moving direction of the lens unit, and thereflection plate is disposed on a side surface of the coil.

In another embodiment, a photography device with anti-shake function,includes: a base; a lens holder disposed horizontally movably above thebase and inserting a lens in an inside thereof; a cover disposed abovethe base to enclose the lens holder; a wire spring of which upper end ismounted to the cover and lower end is mounted to the lower end of thelens holder to elastically support the lens holder in an up and downdirection; a first substrate mounted to the lower end of the lens holderand formed with a first copperplate part to which the lower end of thewire spring is penetratively fixed; and a drive unit connected with thelower end of the wire spring or the first substrate and electricallyconnected with the wire spring to move the lens holder in a horizontaldirection upon power apply.

The drive unit includes a coil member mounted to a side surface of thelens holder and forming a magnetic field upon power apply to move thelens holder horizontally; upper magnet and lower magnet mounted betweenthe base and the cover and disposed adjacently to the coil member; andan iron piece member having one end mounted between the upper magnet andthe lower magnet and the other end inserted in a center of the coil,wherein an end of the coil member is fixed to the first copperplate parttogether with the wire spring.

The first substrate is formed with an avoid groove in which the end ofthe coil member is disposed, and a size of the avoid groove is greaterthan a diameter of the end of the coil member.

A side surface of the cover is formed with an upper fixation part inwhich the upper magnet is inserted and a side surface of the base isformed with a lower fixation part in which the lower magnet is inserted,and the upper fixation part and lower fixation part are formed with astopping projection that prevents the upper magnet or the lower magnetfrom moving towards the lens holder, respectively.

The photography device further includes: a control unit mounted belowthe bas to control the power supplied to the drive unit; and a secondsubstrate formed with a second copperplate part to which the upper endof the wire spring is penetratively fixed, wherein the second substrateis formed with a flexible circuit unit that electrically connects thesecond substrate with the control unit and side surfaces of the coverand the base are formed with a seating groove in which the flexiblecircuit unit is inserted and seated.

The upper part of the lens holder is formed with a stopping groove, andthe cover is formed with a stopping projection which projects downwardlyand inserted in the stopping groove, and rotation and ascent of the lensholder are prevented by the stopping projection and the stopping groove.

In further another embodiment, a photography device with anti-shakefunction includes: a housing; a holder mounted horizontally movably tothe housing; a lens unit mounted up and down movably in an inside of theholder and including a lens therein; a first coil member mounted in anoutside of the lens unit; a second coil member mounted to the holder; amagnet mounted to a side surface of the housing; and an iron piecemember having one end which is in contact with the magnet and the otherend which is disposed adjacently to the first coil member, wherein thelens unit moves up and down by interaction of a magnetic field generatedby the magnet and induced via the iron piece member with a firstelectromagnetic field generated when power is applied to the first coilmember, and the holder moves horizontally by interaction of the magneticfield generated by the magnet and induced via the iron piece member witha second electromagnetic field generated when power is applied to thesecond coil member.

The first coil member is wound on an outer circumferential surface ofthe lens unit with respect to an optical axis of the lens, the secondcoil member is wound in a hollowed cylindrical shape and mounted on anouter circumferential surface of the holder, and the iron piece memberpenetrates the second coil member.

The holder includes a through hole penetratively formed in a sidesurface of the holder so that an inside and outside of the holdercommunicates with each other; and a fixation projection projectingtowards the magnet from both sides of the through hole, wherein thesecond coil member is inserted on the fixation projection and the ironpiece member passes through the second coil member between the fixationprojections and is penetratively inserted in the through hole.

The magnet is mounted to upper and lower ends of the iron piece member,respectively, and the polarities on sides in contact with the iron pieceare the same.

The photography device further includes: a first elastic member mountedto the lens unit to elastically support the lens unit in an up and downdirection and electrically connected with the first coil member; and apower terminal connected with the first elastic member to transfer powerto the first coil member via the first elastic member, wherein the powerterminal includes a first extension part formed parallel to an outersurface of the holder; and a second extension unit bent from the firstextension part.

The photography device further includes: a second elastic member havingone end mounted to the housing and the other end mounted to the holderto elastically support the holder in a horizontal direction, wherein thesecond elastic member is connected with the second coil member totransfer the power to the second coil member.

The second coil member is provided in plural such that a pair of thesecond coil members is mounted on the outer surface of the holder facingwith each other, and the second elastic member is provided in pluralsuch that the second elastic member applies the same power to the pairof facing second coil members.

In further another embodiment, a photography device with anti-shakefunction includes: a housing; a first blade disposed in an inside of thehousing and including a lens therein, the first blade being movable inan up and down direction by a magnet and a first coil member; a firstelastic member electrically connected with the first coil member andelastically supporting the first blade in the up and down direction; anda first power connection member disposed in an up and down direction ofthe first elastic member to supply power to the first coil member,wherein any one of the first elastic member or the first powerconnection member is formed with a contact projection and the contactprojection is electrically connected with the other.

The photography device further includes: a second blade mountedhorizontally movably in the inside of the housing and in an inside ofwhich the first blade is mounted movably in the up and down direction;and a second coil member mounted on a side surface of the second blade,wherein the magnet is disposed to the housing adjacently to the secondcoil member and moves the second blade in a horizontal direction byinteraction of an electromagnetic field generated when power is appliedto the second coil member with a magnetic field generated in the magnet,and the first elastic member has an outside fixed to upper or lower sideof the second blade and an inside coupled to the first blade, and thefirst power connection member is fixed to the housing and moves togetherwith the second blade upon the horizontal movement of the second bladewith the first elastic member being in contact with the first powerconnection member by the contact projection.

The contact projection is formed in the first elastic member and is benttowards the first power connection member to be in contact with thefirst power connection member, and one end of the contact projection isconnected with the first elastic member and the other end is laid free.

The housing includes a first housing which is separated toward upperside of the first blade and a second housing which is separated towardlower side of the first blade, and the first elastic member is mountedto the upper side of the first blade and disposed below the housing, andthe first power connection member is formed with a contact terminalwhich is bent downwardly and of which one surface is in contact with thelower surface of the first housing and the other surface is in contactwith the contact projection.

A side surface of the first housing is formed with a guide groove inwhich the contact terminal is penetratively inserted, and the contactterminal includes a connection part which is smaller than a width of theguide groove; a copperplate part which is greater than the width of theguide groove, forming extending from the connection part, and issupported by a lower surface of the first housing to be in contact withthe contact projection, and a stopping projection that projectsdownwardly to be in contact with a side surface of the copperplate partis formed in both sides of the guide groove to prevent departure of thecopperplate part.

The photography device further includes: a yoke member which is mountedto the housing so as to be in contact with the magnet and is formed witha magnetism inducement projection passing through the second coil memberand the second blade and being in contact with the first coil member,wherein the first coil member is mounted to the side surface of thefirst blade and moves the first blade up and down by interaction of anelectromagnetic field generated upon power apply with the magnetic fieldof the magnet induced via the magnetism inducement projection.

The photography device further includes: a second elastic member havingone end mounted to the housing and the other end mounted to the secondblade and supporting the second blade in a horizontal direction, whereinthe second elastic member has one end electrically connected with thefirst power connection member and the other end electrically connectedwith the second coil member and transfer the power of the first powerconnection member to the second coil member.

In further another embodiment, a photography device with anti-shakefunction includes: a housing; a first blade disposed movably in an upand down direction in an inside of the housing and mounted with a firstcoil member in an outside thereof; a second blade disposed horizontallymovably in an inside of the first blade and mounted with a second coilmember in an outside thereof; and a magnet disposed between an innersurface of the first blade and an outer surface of the second blade,wherein the first blade and the second blade moves up and down togetherby interaction of a first electromagnetic field generated when power isapplied to the first coil member with a magnetic field generated in themagnet, and the second blade moves horizontally independently from thefirst blade by interaction of a second electromagnetic field generatedwhen the power is applied to the second coil member with the magneticfield generated in the magnet.

The photography device further includes: a base mounted to a lower sideof the housing, wherein the magnet has one surface disposed towards thefirst coil member and the other surface disposed towards the second coilmember and fixed to the base, and the first coil member is wound aroundthe first blade and the second coil member is wound on a side surface ofthe second blade in a direction perpendicular to the winding directionof the first coil member.

The photography device further includes: a first elastic member havingan outside fixed to the housing and an inside mounted to the first bladeto elastically support the first blade in an up and down direction,wherein the first elastic member includes a conductor layer connectedwith an external power source to transfer power to the first coil memberand the second coil member; and an insulation layer which coats theconductor layer.

The photography device further includes: a second elastic member havingone end mounted to the first blade and the other end mounted to thesecond blade and supporting the second blade in a horizontal direction,wherein the coil member receives external power as an end of the firstcoil member is electrically connected with the conductor layer of thefirst elastic member, and the second coil member receives the externalpower as an end of the second coil member is electrically connected withthe other end of the second elastic member and one end of the secondelastic member is electrically connected with the conductor layer of thefirst elastic member.

An upper side of the first blade is formed with a through hole in whichthe magnet is penetratively inserted when the first blade moves up anddown.

The photography device further includes: a yoke member which is incontact with the magnet, wherein the magnet includes a first magnetwhich is in contact with an upper surface of the yoke member and asecond magnet which is in contact with a lower surface of the yokemember, and polarities of the first magnet and second magnet are formedin an up and down direction such that the polarities are disposedsymmetrically in the up and down direction, and the yoke member has onesurface disposed towards the first coil member and the other surfacedisposed towards the second coil member.

The yoke member is formed with a magnetism inducement projection whichprojects towards the second coil member and inserted in a center of thesecond coil member and the magnetism inducement projection induces themagnetic field of the magnet towards the second coil member.

The photography device with anti-shake function of the present inventioncan move the lens in a direction correcting shake when the shake isgenerated upon photographing of an object to thereby allow the object tobe clearly photographed.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other objects, features and advantages of the presentinvention will become apparent from the following description ofpreferred embodiments given in conjunction with the accompanyingdrawings, in which:

FIG. 1 is a perspective view illustrating a photography device withanti-shake function in accordance with a first embodiment of the presentinvention.

FIG. 2 is an exploded perspective view illustrating the photographydevice of FIG. 1.

FIG. 3 is an exploded perspective view illustrating a lens unit shown inFIG. 2.

FIG. 4 is an enlarged exploded perspective view of ‘D’ in FIG. 2.

FIG. 5 is a sectional view of the photography device taken along a lineA-A in FIG. 1.

FIG. 6 is an enlarged view of a power terminal and a second elasticmember shown in FIG. 2.

FIGS. 7 and 8 are views taken along a line B-B in FIG. 1 andillustrating operation state of the photography device, viewed from onedirection.

FIGS. 9 and 10 are views taken along a line C-C in FIG. 1 andillustrating operation state of the photography device, viewed from onedirection.

FIG. 11 is a perspective view illustrating a photography device withanti-shake function in accordance with a second embodiment of thepresent invention.

FIG. 12 is an exploded perspective view illustrating the photographydevice of FIG. 11, viewed from one direction.

FIG. 13 is an exploded perspective view illustrating the photographydevice of FIG. 11, viewed from another direction.

FIG. 14 is a sectional view illustrating the photography device of FIG.11.

FIG. 15 is a sectional view illustrating operation state of thephotography device of FIG. 14.

FIG. 16 is a perspective view illustrating a photography device withanti-shake function in accordance with a third embodiment of the presentinvention.

FIG. 17 is an exploded perspective view illustrating the photographydevice of FIG. 16.

FIG. 18 is a partially enlarged exploded perspective view of ‘D’ in FIG.17.

FIGS. 19 to 21 are sectional views taken along a line B-B in FIG. 16.

FIG. 22 is a sectional view taken along a line C-C in FIG. 16.

FIG. 23 is a perspective view illustrating a photography device withanti-shake function in accordance with a fourth embodiment of thepresent invention.

FIG. 24 is an exploded perspective view illustrating the photographydevice of FIG. 23, viewed from one direction.

FIG. 25 is an exploded perspective view illustrating the photographydevice of FIG. 23, viewed from another direction.

FIG. 26 is a view illustrating a state of coupling first and secondblades with a first elastic member in the fourth embodiment.

FIG. 27 is a view illustrating a state of coupling a first housing and afirst power connection member with the first elastic member in thefourth embodiment.

FIGS. 28 and 29 are sectional views taken along a line B-B in FIG. 23.

FIGS. 30 and 31 are sectional views taken along a line C-C in FIG. 23.

FIG. 32 is a perspective view illustrating a photography device withanti-shake function in accordance with a fifth embodiment of the presentinvention.

FIG. 33 is an exploded perspective view illustrating the photographydevice of FIG. 32, viewed from one direction.

FIG. 34 is an exploded perspective view illustrating the photographydevice of FIG. 32, viewed from another direction.

FIG. 35 is a sectional view taken along a line B-B in FIG. 32.

FIGS. 36 and 37 are sectional views illustrating operation state of thephotography device in FIG. 35.

DETAILED DESCRIPTION OF THE INVENTION

Hereinafter, a first embodiment of the present invention will bedescribed.

FIG. 1 is a perspective view illustrating a photography device withanti-shake function in accordance with a first embodiment of the presentinvention; FIG. 2 is an exploded perspective view illustrating thephotography device of FIG. 1; and FIG. 3 is an exploded perspective viewillustrating a lens unit shown in FIG. 2.

FIG. 4 is an enlarged exploded perspective view of ‘D’ in FIG. 2; FIG. 5is a sectional view of the photography device taken along a line A-A inFIG. 1; and FIG. 6 is an enlarged view of a power terminal and a secondelastic member shown in FIG. 2.

The photography device of the first embodiment includes a lens unit 500,a drive member 610, a first elastic member 620, a support member 630, afirst coil 640, a first magnet 650, an iron piece 660, a sensing means670, a power terminal 680, a housing 690, a cover 695, an image sensor700 and a control unit 710.

The lens unit 500 functions to move a lens 510 mounted therein in anoptical axial direction of the lens 510 to adjust focus to an object.

Specifically, the lens unit 500 includes, as illustrated in FIG. 3, alens barrel 520 for enclosing the lens 510 therein, a holder 530 forinserting the lens barrel 520 therein, an actuator disposed between theholder 530 and the lens barrel 520 to move the lens barrel 520 in theoptical axial direction of the lens 510, and second elastic members 550mounted on upper and lower ends of the lens barrel 520 to support thelens barrel 520 elastically and movably in the optical axial directionof the lens 510.

Also, the actuator includes a yoke 543 fixed to an inside of the holder530, a second magnet 542 mounted in an inside of the yoke 543 anddisposed opposite to the lens barrel 520, a second coil 541 winded on anoutside of the lens barrel 520 to move the lens barrel 520 in theoptical axial direction of the lens 510 by a magnetic field generatedupon power apply.

Below this lens unit 500, the image sensor 700 is disposed asillustrated in FIG. 2 to photograph the image of the object transmittedthrough the lens 510.

At this time, the lens 510 moves in the optical axial direction tosharpen the focus of the image photographed on the image sensor 700.

Also, the lens unit 500 moves in a direction correcting the shake by thefirst coil 640, the first magnet 650 and the iron piece 660 in order toprevent the image photographed on the image sensor 700 from beingblurred due to shake by a user.

That is, the lens unit 500 moves in a direction perpendicular to theoptical axial direction of the lens 510 to prevent the imagephotographed on the image sensor 700 from being blurred due to shake.

In order to sense the shake of the photography device, the photographydevice is provided with a gyro-sensor (not shown).

The gyro-sensor senses the shaken angle of the photography device andtransfers it to the control unit 710.

The control unit 710 is disposed below the image sensor 700 anddetermines moving direction and moving distance of the lens unit 50using the measured value of the gyro-sensor.

That is, the control unit 710 applies power to the first coil 640according to the measured value of the gyro-sensor to control the movingdistance of the lens unit 500 in a lateral direction.

This lens unit 500 is fixed in the inside of the drive member 610 andmoves together with the drive member 610 in the direction perpendicularto the optical axial direction of the lens 510.

Specifically, the drive member 610 has a hexahedral shape with openedupper and lower ends, and the lens unit 500 is inserted and fixed in aninside of the drive member 610.

That is, the drive member 610 is formed such that four planes areconnected, and the first coil 640 is fixed onto an outer surface of thedrive member 610.

The first coil 640 is disposed adjacently to the first magnet 650 andthe iron piece 660 to move the drive member 610 in the directionperpendicular to the optical axial direction of the lens 510 by amagnetic field generated upon power apply.

Specifically, the first coil 640 is an electric wire through whichelectricity flows and is wound around the other end of the iron piece660.

Also, a center of the first coil 640 is formed with a hole larger thanthe other end of the iron piece 660, and the other end of the iron piece660 is inserted in the hole.

At this time, the iron piece 660 inserted in the hole is not in contactwith the first coil 640.

This first coil 640 forms a magnetic field in the center of the firstcoil in a direction perpendicular to winding direction of the coil 640upon power apply.

That is, the magnetic field generated by the first coil, which isindicated by an arrow ‘E’ in FIG. 5, is formed parallel to the ironpiece 660.

Also, the magnetic field of the first coil 640 is formed in a directionof the magnetic field of the first magnet 650 or an opposite directionto the direction of the magnetic field of the first magnet 650 dependingon the direction of the current flowing through the first coil 640.

Meanwhile, the first magnet 650 and the iron piece 660 are fixed in thehousing 690 and disposed adjacently to the first coil 640.

The housing 690 has a hexahedral shape with both opened upper and lowerparts and inserts the drive member 610 in an inside thereof.

Also, the cover 695 for enclosing the housing 690 is mounted on theoutside of the housing 690.

The first magnet 650 and the iron piece 660 are mounted in the insidesurface of the housing 690 to face with the first coil 640.

The first magnet 650 is disposed adjacently to the first coil 640 andforms a magnetic field in a direction parallel to the magnetic fieldgenerated in the first coil 640.

Specifically, the first magnet 650 is formed in a hexahedral shape witha width similar to that of the first coil 640.

Also, the first magnet 650 is mounted on upper and lower sides of oneend of the iron piece 660, respectively.

At this time, the polarity of the first magnet is divided into upper andlower parts, wherein the polarities on sides in contact with the ironpiece 660 are the same.

That is, if the N pole of the first magnet 650 disposed on the upperside is in contact with the one end of the iron piece 660, the N pole ofthe first magnet 650 disposed on the lower side also comes into contactwith the one end of the iron piece 660.

This leads the magnetic field generated in the first magnet 650 to beformed penetrating the inside of the first coil 660 through the ironpiece 660.

That is, the magnetic field generated in the magnet 650, which isindicated by an arrow ‘F’ in FIG. 5, is formed parallel to the magneticfield generated in the first coil 640.

At this time, the iron piece 660 enables the magnetic field generated inthe magnet 650 to be transferred to the center of the first coil 640.

Specifically, the iron piece 660 is made of magnetic substance andformed having a width similar to that of the first magnet 650.

Also, one end of the iron piece 660 is mounted with the first magnet 650and the other end of the iron piece is projected toward the first coil640 and inserted in the center of the first coil 640.

Accordingly, the iron piece 660 transfers the magnetic field F generatedin the first magnet 650 form one end of the iron piece 660 to the otherend so that the magnetic field F is parallel to the magnetic field Egenerated in the first coil 640.

As such, the magnetic field generated in the first coil 640 moves thedrive member 610 in the direction perpendicular to the optical axialdirection of the lens 510 by interference with the magnetic fieldgenerated in the first magnet 650.

Meanwhile, the drive member 610 is mounted with the first elastic member620 of which one end is connected with the support member 630 and theother end is connected with the drive member 610 to support the drivemember 610 elastically and movably in a direction perpendicular to theoptical axis of the lens 510.

The support member 640 is disposed below the lens unit 500, i.e. belowthe drive member 610 and coupled with the housing 690.

Also, the center of the support member 630 is formed with an openinghole 631 of which upper and lower parts are opened, so that the imagetransmitted through the lens unit 500 passes through the support member630.

At this time, the image sensor 700 is disposed below the support member630 to photograph the image of the object transmitted through the lens500.

The first elastic member 630 is formed of a straight wire spring, andone end thereof is fixed to the support member 630 and the other endthereof is fixed to the drive member 610.

That is, the first elastic member 630 is formed straightly from thesupport member 630 to the drive member 610.

The other end is mounted to the drive member 610 for the purpose ofstability in this embodiment, though the other end of the first elasticmember 620 may be connected directly to the lens unit 500 if necessary.

Also, total four first elastic members 620 are mounted in the vicinityof upper corner of the drive member 610.

That is, the first elastic members 620 support four symmetric points onthe side of the drive member 610 to allow that the drive member 610keeps horizontal.

Also, the first elastic member 620 is contracted and released in thedirection of the movement of the drive member 610 upon the movement ofthe drive member 610 to guide the movement of the drive member 610 inthe direction perpendicular to the optical axis of the lens andelastically restore the drive member to the original position.

Also, the first elastic member 620 is connected to the first coil 640and the control unit 710 to transfer power applied from the control unit710 to the first coil 640.

Specifically, one end of the first elastic member 620 connected with thesupport member 630 is connected to the control unit 710 disposed belowthe support member 640, and the other end of the first elastic member620 connected with the drive member 610 is connected to the first coil710 mounted on the drive member 610.

Accordingly, the first coil 640 and the control unit 710 are connectedwithout a separate means by the first elastic member 620 and the powergenerated from the control unit 710 can be transferred to the first coil640.

As such, as the first elastic member 620 is connected to the controlunit 710 and the first coil 640 to transfer power applied from thecontrol unit 710 to the first coil 640, it is possible to simplifyoverall constitution and structure of the photography device.

Likewise, the lens unit 500 is also mounted with the power terminal 680which transfers power supplied from the control unit 710.

As illustrated in FIG. 6, the power terminal is made of a thin metalplate, and one end thereof is connected with the control unit 710 andthe other end is connected with the lens unit 500 to transfer power tothe lens unit 500.

Also, the power terminal 680 is formed in two, which are separate andsymmetric with respect to the optical axis of the lens 510.

Also, the power terminal 680 is connected with the second elastic member550 built in the lens unit 500 to transfer power to the second coil 541of the lens unit 500.

At this time, the power terminal 680 is formed integrally with thesecond elastic member 550 and thus connected with the second elasticmember 550.

Of course, the power terminal 680 and the second elastic member 550 maybe formed separately, but it is preferred to form them integrally so asto simplify overall constitution.

Meanwhile, upon the movement of the lens unit 500 in left and rightdirections, one end of the power terminal 680 integrally connected withthe second elastic member 550 of the lens unit 500 moves the left andright directions together with the lens unit 500 but the other end ofthe power terminal 680 connected with the control 710 does not move.

That is, upon the left and right directional movement of the lens unit500, the power terminal 680 functions as resistance against the movementof the lens unit 500 and thus obstructs the movement of the lens unit500 since one end thereof moves but the other end does not moves.

In order to prevent this phenomenon, the power terminal 680 includes afirst extension part 681 and a second extension part 682 for reducingthe force that resists the movement of the lens unit 500.

Specifically, the first extension part 681 is formed parallel to onesurface of the lens unit 500 and has a length similar to that of theside surface of the second elastic member 550.

Also, one end of the first extension part 681 is formed with a firstjunction part 683 that projects toward the lens unit 500, i.e. upwardly,and the first junction part 683 is connected with the lens unit 500.

Also, the other end of the first extension part 681 is connected withthe second extension part 682.

The second extension part 682 is formed parallel to another surface ofthe lens unit 500 that is adjacent to one surface of the lens unit 500.

That is, the second extension part 682 is bended in a directionperpendicular to the first extension part 681 and extends to a lengthsimilar to that of the side surface of the second elastic member 550.

This one end of the second extension part 682 is connected with thefirst extension part 681 and the other end is formed with a secondjunction part 684 that projects toward the control unit 710, i.e.downwardly, and the second junction part 684 is connected with thecontrol unit 710.

The second junction part 684 is connected with the control unit 710 totransfer power to the lens unit 500.

These first extension part 681 and second extension part 682 are made ofthin metal plate, and are thick in the optical axial direction of thelens and thin in the moving direction of the lens unit 500 so that it iseasily bent in the moving direction of the lens unit 500.

Also, upon the movement of the lens unit 500, the first junction part683 moves along the lens unit 500 but the second junction part 684 doesnot move since it is fixed.

According to the above structure, the first extension part 681 and thesecond extension part 682 minimize the force resisting against themovement of the lens unit 500 in the moving direction while an anglebetween the first extension part 681 and the second extension part 682decreased or increased.

Meanwhile, the control unit 710 that supply power to the first coil 640controls moving distances of the drive member 610 in a first direction Xand a second direction Y.

The first direction X is the direction indicated by an arrow ‘X’ in FIG.1, and the second direction Y is the direction indicated by an arrow ‘Y’in FIG. 1.

The first direction X and the second direction Y are perpendicular tothe optical axial direction of the lens 510, and the second direction Yis perpendicular to the first direction X.

At this time, the sensing means 670 is mounted in the inside of thehousing 690 to measure the moving distances of the drive member 610.

Specifically, the sensing means 670 includes a first sensor 671, asecond sensor 672, a third sensor 673 and a fourth sensor 674.

The first sensor 671 is disposed in one side of the drive member 610 tomeasure the moving distance of the drive member 610 in the firstdirection X, and the second sensor 672 is disposed in the opposite sideto the one side of the drive member 610 to measure the moving distanceof the drive member 610 in the first direction X together with the firstsensor 671.

That is, the first sensor 671 and the second sensor 672 are disposed insymmetric positions.

Therefore, the measure value of the second sensor 672 is decreased ifthe measured value of the first sensor 671 is increased, and the measurevalue of the second sensor 672 is increased if the measured value of thefirst sensor 671 is decreased.

The third sensor 673 is disposed in another side of the drive member 610that is adjacent to the one side to measure the moving distance of thedrive member 610 in the second direction Y, and the fourth sensor 674 isdisposed in the opposite side to another side of the drive member 610 tomeasure the moving distance of the drive member 610 in the seconddirection Y together with the third sensor 673.

That is, the third sensor 673 and the fourth sensor 674 are disposed insymmetric positions.

Therefore, the measure value of the fourth sensor 674 is decreased ifthe measured value of the third sensor 673 is increased, and the measurevalue of the fourth sensor 674 is increased if the measured value of thethird sensor 673 is decreased.

By using the measured values of the sensing means 670, the control unit710 enables the drive member 610 to be accurately moved to the positionto be moved.

That is, the control unit 710 confirms the position of the drive member610 in real time using the sensing means 670 and controls the movingdistance of the drive member 610 accurately.

If necessary, it is possible to measure the moving distance in the firstdirection X and the moving distance in the second direction Y with asingle sensor by each direction.

That is, it may be possible to measure the moving distance in the firstdirection X only with the first sensor 671 without the second sensor672, and the moving distance in the second direction Y only with thethird sensor 673 without the fourth sensor 674.

However, a PR sensor or a hole sensor that is used as the sensing meanshas an error in the measured value with temperature variation and thusit is preferred to employ not only the first sensor 671 and the thirdsensor 673 but also the second sensor 672 and the fourth sensor 674.

The reason that two sensors are required in each direction is asfollows:

It is difficult to measure the measured value S₁ of the first sensor 671and the measured value S₃ of the third sensor 673 accurately since anintrinsic constant k of the sensor is varied with temperature variation.That is,

S ₁ =k(d+α _(x))  (1)

S ₃ =k(d+α _(y))  (2)

where, S₁ is the measured value of the first sensor 671, S₃ is themeasured value of the third sensor 673, k is an intrinsic value of thesensing means, d is an initial position of the sensor, α_(x) is themoving distance of the drive member 610 in the first direction X andα_(y) is the moving distance of the drive member 610 in the seconddirection Y.

As such, the control unit 710 cannot control the drive member 619accurately since the measured value of the sensing means is varied withthe temperature variation.

Therefore, the second sensor 672 and the fourth sensor 674 are used tomeasure the moving distance of the drive member 610 even though thetemperature is varied.

Specifically, the control unit 710 controls the moving distance of thelens unit 500 in the first direction X using the value obtained bydividing the difference between the measured value S₁ of the firstsensor 671 and the measured value S₂ of the second sensor 672 by sum ofthe measured value S₁ of the first sensor 671 and the measured value S₂of the second sensor 672. That is,

$\begin{matrix}{\frac{S_{1} - S_{2}}{S_{1} + S_{2}} = {\frac{{k\left( {d + \alpha_{x}} \right)} - {k\left( {d - \alpha_{x}} \right)}}{{k\left( {d + \alpha_{x}} \right)} + {k\left( {d - \alpha_{x}} \right)}} = \frac{\alpha_{x}}{d}}} & (3)\end{matrix}$

Likewise, the control unit 710 controls the moving distance of the lensunit 500 in the second direction Y that is perpendicular to the firstdirection X using the value obtained by dividing the difference betweenthe measured value S₃ of the third sensor 673 and the measured value S₄of the fourth sensor 674 by sum of the measured value S₃ of the thirdsensor 673 and the measured value S₄ of the fourth sensor 674. That is,

$\begin{matrix}{\frac{S_{3} - S_{4}}{S_{3} + S_{4}} = {\frac{{k\left( {d + \alpha_{y}} \right)} - {k\left( {d - \alpha_{y}} \right)}}{{k\left( {d + \alpha_{y}} \right)} + {k\left( {d - \alpha_{y}} \right)}} = \frac{\alpha_{y}}{d}}} & (4)\end{matrix}$

As can be seen from the equation 3 and the equation 4, the control unit710 measures the moving distance of the drive member 610 regardless ofthe intrinsic constant k of the sensing means.

That is, since α_(x), α_(y) and d are constants that are irrelevant tothe temperature variation, it is possible to obtain the value that isirrelevant to the temperature variation.

Consequently, the control unit 710 can minimize the error in themeasured value of the sensing means 670 with the temperature variation.

Meanwhile, the drive member 610 is formed with a reflection plate 615that reflects the signal of the sensing means 670 upon the measurementof the sensing means 670.

Specifically, the reflection plate 615 has a rectangular shape, and isprojected parallel to the sensing means 670 in the moving direction ofthe lens unit 500.

That is, the reflection plate 615 is formed so as to face with the firstsensor 671, the second sensor 672, the third sensor 673 and the fourthsensor 674 to reflect the signals of the first sensor 671, the secondsensor 672, the third sensor 673 and the fourth sensor 674,respectively.

Also, the reflection plate 615 is disposed at a side surface of thefirst coil 640 mounted on the drive member 610 and is formed wider thanthe first coil 640.

Of course, the sensing means 670 can the signal at the outer surface ofthe drive member 610 without the reflection plate 615, but it is notpreferred to measure since the first coil 640 is mounted on the outersurface of the drive member 610.

As described above, it is possible to measure the moving distance of thelens unit 500 accurately by forming the reflection plate 615 thatreflects the signal of the sensing means 670 and it is possible toensure the measurement range of the sensing means 670 stably bydisposing the reflection plate 615 at the side surface of the first coil640.

Next, operation of the photography device in accordance with the firstembodiment of the present invention constituted as described above willbe described.

FIGS. 7 and 8 are views taken along a line B-B in FIG. 1 andillustrating operation state of the photography device, viewed from onedirection, and FIGS. 9 and 10 are views taken along a line C-C in FIG. 1and illustrating operation state of the photography device, viewed fromone direction.

As illustrated in FIG. 7, the drive member with built-in lens unit 500is mounted parallel to the image sensor 700 by the first elastic member620 and placed on a concentric line with the image sensor 700.

Also, the first elastic member 620 keeps the state of being parallel tothe optical axial direction of the lens 510 and elastically supports thedrive member 610.

At this time, as illustrated in FIG. 9, the first extension part 681 andthe second extension part 682 of the power terminal 680 keep the stateof being perpendicular to each other.

Meanwhile, the control unit 710 moves the drive member 610 in thedirection correcting shake when the gyro-sensor mounted on thephotography device senses the shake.

That is, as illustrated in FIGS. 8 and 9, the control unit 710 suppliespower to the first coil 640 to move the drive member 610 with built-inlens unit 500 in the first direction X that is perpendicular to theoptical axial direction, i.e. a left and right direction.

Specifically, the first magnet 650 always forms a magnetic field in adirection from one end of the iron piece 660 to the other end of theiron piece 660, and the first coil 640 forms a magnetic field in thesame direction as or an opposite direction to the direction of themagnetic field generated in the first magnet 650 depending on thedirection of the current flowing through the first coil 660 when thepower is applied to the first coil 640.

That is, when the magnetic field of the first magnet 650 and themagnetic field of the first coil 640 are formed in the same direction,the first coil 640 moves toward the first magnet 650.

On the contrary, when the magnetic field of the first magnet 650 and themagnetic field of the first coil 640 are formed in different directions,the first coil 640 moves away from the first magnet 650.

As such, the drive member 610 with the built in lens unit 500 can movein the first direction X that is perpendicular to the optical axialdirection of the lens 510 depending on the direction of the currentflowing through the first coil 640.

At this time, the iron piece 660 enables the magnetic field generated inthe magnet 650 to be parallel to the magnetic field generated in thefirst coil 640 and thus enhances the driving force of the first coil640.

Likewise, the drive member 610 also moves in the second direction Y thatis perpendicular to the first direction X.

That is, the drive member 610 with the built in lens unit 610 also movesin the second direction Y that is perpendicular to the first direction Xby the first coil 640, the first magnet 650 and the iron piece that aredisposed in the direction perpendicular to the first direction X.

As such, the drive member 610 moves in the first direction X and thesecond direction Y and thus can move all directions perpendicular tooptical axial direction of the lens 510.

Also, the first elastic member 620 comes to be leaned to the firstdirection X and thus be relaxed as the drive member 610 moves asillustrated in FIG. 10.

Also, the angle between the first extension part 681 and the secondextension part 682 decreased or increased as the drive member 610 movesand thus the power terminal 680 reduces the resistance of the powerterminal 680 due to the movement of the drive member 610.

Specifically, as illustrated in FIG. 10, the first junction part 683moves in the direction of an arrow, i.e. in the first direction Xtogether with the drive member 610 and the first extension part 681 andthe second extension part 682 lean toward the lens 510 or the oppositeside of the lens 510.

That is, the first extension part 681 and the second extension part 682reduces the force that resists the movement of the drive member 610while they move close to and away from each other.

The photography device with anti-shake function in accordance with thepresent invention makes an image photographed on the image sensor 700clear by forming magnetic fields formed in the first magnet 650 and thefirst coil 640 parallel to each other and moving the drive member 610with built in lens unit 500 in the opposite direction of the shake.

Hereinafter, a second embodiment of the present invention will bedescribed.

FIG. 11 is a perspective view illustrating a photography device withanti-shake function in accordance with a second embodiment of thepresent invention; FIG. 12 is an exploded perspective view illustratingthe photography device of FIG. 11, viewed from one direction; and FIG.13 is an exploded perspective view illustrating the photography deviceof FIG. 11, viewed from another direction.

FIG. 14 is a sectional view illustrating the photography device of FIG.11; and FIG. 15 is a sectional view illustrating operation state of thephotography device of FIG. 14.

As illustrated in FIGS. 11 to 13, the photography device of the presentembodiment includes a base 110, a lens holder 120, a cover 130, a wirespring 140, a first substrate 150, a second substrate 160, a controlunit 170 and a drive unit 180, and the drive unit 180 includes a coilmember 181, an upper magnet 182, a lower magnet 183 and an iron piecemember 184.

The base 110 has a generally rectangular shape and is formed with anopening hole of which upper and lower parts are opened, and an outercorner part projects upwardly to come in contact with the cover 130.

Also, in an outside of the base 110, i.e. between the upwardly projectedcorner parts, a lower fixation part 111 for mounting the lower magnet183 therein is formed.

The lower fixation part 111 is formed in four places that are symmetricwith each other along the outer surface of the base 110, and is formedby being depressed downwardly on the upper surface.

Also, below the lower fixation part 111, a stopping projection 112 thatprojects upwardly is formed.

The stopping projection 112 is formed as a bottom surface of the lowerfixation part 111 abutting the inside of the base 110 is projectedhigher than the bottom surface of the lower fixation part 111 abuttingthe outside of the lower fixation part 111.

Therefore, the stooping projection 112 functions to stop the movement ofthe lower magnet 183 mounted to the outside of the lower fixation part111 in a direction toward the inside of the base 110, i.e. in adirection toward the lens holder 120.

This base 110 is generally disposed above the image sensor thatphotograph an image of an object, and the lens holder 120 for mounting alens therein is disposed above the base 110.

A size of the lens holder 120 is formed smaller than the inner width ofthe base 110 so as not to be interfered with the inner surface of thebase 110, and the center of the lens holder is formed with a hole forinserting a lens (not shown) therein.

Both sides of the hole of the lens holder 120 are formed with a stoppinggroove 121 depressed downwardly, respectively.

Also, the lens holder 120 has a lower end of the corner part extendingin a plate shape, and the wire spring is inserted in and passes throughthis corner part.

Also, the cover 130 is disposed above the lens holder 120 and mounted onthe base 110 so as to enclose the lens holder 120.

The cover 130 has a rectangular shape and has an outer corner part,which projects toward the base 110 and is engagingly coupled with thebase 110 so as to enclose the lens holder 120.

Also, the center of the cover 120 is formed with an opening hole that iscommunicated with the lens holder 120, and both sides of the openinghole are formed with a stopping projection 133 inserted in the stoppinggroove 121 of the lens holder 120, respectively.

The stopping projection 133 is downwardly projected toward the lensholder 120 and is stopped in the stopping groove 121.

As described above, the lens holder 120 is prevented from being rotatedand lifted to damage the wire spring 140 by forming the stopping groove121 in the upper part of the lens holder 121 and forming the stoppingprojection 133 downwardly projecting to be inserted in the stoppinggroove 121 in the cover 130.

Also, an upper fixation part 131 is formed between the outer cornerparts of the cover 130 that are projected toward the base 110.

Like the lower fixation part 111, the upper fixation part 131 is formedin four places that are symmetric with each other along the outersurface of the cover 130, and is formed by being depressed upwardly onthe lower surface.

Also, above the upper fixation part 131, a stopping projection 132 thatprojects downwardly is formed.

The stopping projection 132 is formed as a top surface of the upperfixation part 131 abutting the inside of the cover 130 is projectedhigher than the top surface of the upper fixation part 131 abutting theoutside of the upper fixation part 131.

Therefore, the stooping projection 132 functions to stop the movement ofthe upper magnet 182 mounted to the outside of the upper fixation part111 in a direction toward the inside of the cover 130, i.e. in adirection toward the lens holder 120.

As described above, it is possible to guide the positions uponassembling of the lower magnet 182 and the upper magnet 183 and preventdeparture of the lower magnet 182 and the upper magnet 183 from thelower fixation part 111 and the upper fixation part 131 by forming thestopping projections 112, 132 that stop the movement of the lower magnet182 and the upper magnet 182 in the direction toward the lens holder 120in the lower fixation part 111 and the upper fixation part 131.

The wire spring 140 is made of metal material through which electricityflows, and has a characteristic that it is bent in left and right whenan external force is applied and is restored to the original state whenthe external force is removed.

Also, the wire spring 140 is formed elongated in an up and downdirection, and the upper end thereof is mounted to the cover 130 and thelower end is mounted to the lens holder 120 to elastically support thelens holder 120 upwardly above the cover 130.

That is, tension that floats the lens holder 110 from the base 110 by apredetermined gap is generated in the wire spring 140.

Also, a force is applied downwardly to the lens holder 120 in anassembling process of inserting the lens in the lens holder, and at thistime, the wire spring 140 supports the lens holder 120 upwardly andtightly since its upper end is fixed to the cover 130 and thus does notmove.

As described above, it is possible to generate the force applied to thewire spring in a direction that lengthen the wire spring 140 and thusprevent the wire spring 140 from being excessively bent to be damaged bymounting the upper end of the wire spring 140 to the cover 130 and thelower end to the lower end of the lens holder 120 to support the lensholder 120 with respect to the cover 130.

The lower end of the wire spring 140 is penetratively inserted in thelens holder 120 and the wire spring 140 is connected with the firstsubstrate 150 mounted on the lower end of the lens holder 120.

The first substrate 150 is a rectangular shaped printed circuit board(PCB) and is made of electrically insulated synthetic resin, and isformed with an opening hole that is communicated with the lens holder120 and first copperplate parts 151, into which the lower end of thewire spring 140 is penetratively inserted and fixed, in four symmetricpositions with respect to the opening hole.

The first copperplate part 151 is made by attaching a copperplate alongthe outer surface of the hole that is penetrated in up and downdirection, and is formed so as to allow lead to be easily welded.

That is, the lower end of the wire spring 140 inserted in the firstcopperplate part 151 is soldered and fixed to the first copperplate part151.

Also, the upper end of the wire spring 140 is penetratively inserted inthe cover 130 and connected with the second substrate 160 mounted abovethe cover 130.

The second substrate 160 has a rectangular shape, and is formed with anopening hole that is communicated with the lens holder 120 and secondcopperplate parts 161, into which the upper end of the wire spring 140is penetratively inserted and fixed, in four symmetric positions withrespect to the opening hole.

Like the first substrate 150, the upper end of the wire spring 140 issoldered and fixed to the second copperplate part 161 of the secondsubstrate 160.

Also, the second substrate 160 is formed with a flexible circuit unit162 that electrically connects the second substrate 160 and the controlunit 170.

The flexible circuit unit 162 is made of a flexible printed circuitboard (FPCB) so that is can be easily bent.

Also, the flexible circuit unit 162 is formed so as to be electricallyconnected with the second copperplate part 161.

That is, a metal plate extends between the flexible circuit unit 162 andthe second copperplate part 161 of the second substrate 160 so as toflow electricity therebetween.

This flexible circuit unit 162 is formed extending to the lower side ofthe base 110 along the side surfaces of the cover 130 and the base 110.

At this time, the side surfaces of the cover 130 and the base 110 areformed with a seating groove 135 in which the flexible circuit unit 130is inserted and seated.

The seating groove 135 is formed low toward the inside of the cover 130or the base 110 so that the flexible circuit unit 162 is not projectedover the outer surface of the cover 130 or the outer surface of the base110.

As described above, it is possible to make the anti-shake device havingsame overall outer width to thereby reduce the size and simplify theouter appearance by forming the seating groove 135 in which the flexiblecircuit unit 130 is inserted and seated on the side surfaces of thecover 130 and the base 110.

Meanwhile, the control unit 170 is mounted below the base 110 andconnected with the flexible circuit unit 162 to control power suppliedto the drive unit 180.

The drive unit 180 is mounted between the base 110 and the cover to movethe lens holder 120 in a horizontal direction upon power apply.

That is, the drive unit 180 is connected with the lower end of the wirespring 140 or the first substrate 150, and is electrically connectedwith the wire spring 140 and receives power from the control unit 170 tomove the lens holder 120 in the horizontal direction.

Specifically, the coil member 181 of the drive unit 180 is an electricwire in which a metal wire through which electricity flows is coated byan insulator, and is wound in a direction parallel to the side surfaceof the lens holder 120.

Also, the coil member 181 is mounted on the four symmetric positions onthe outer surface of the lens holder 120.

At this time, the outer surface of the lens holder 120 is formed with aguide projection 122 for guiding the position upon assembly of the coilmember 181 and facilitating the fixation.

Also, the coil members 181 disposed oppositely to each other on the lensholder 120 are made by winding a single wire in opposite directions.

Both ends of this coil member 181, extend, as illustrated in FIG. 14, tobe fixed to the first copperplate part 151 of the first substrate 150together with the lower end of the wire spring 140 so that they areelectrically connected with each other.

However, the end of the coil member 181 extending to both sides of thecoil member 181 is electrically connected with the wire spring 140disposed diagonally thereto.

It is possible to enlarge position for fixing the wire spring 140 andthe drive unit 180 and facilitate the connection between them byconnecting the lower end of the wire spring 140 and the drive unit 180to the first substrate 150 formed with the first copperplate part 151 towhich the lower end of the wire spring 140 is penetratively fixed asdescribed above.

Also, it is possible to simplify the assembly process for connecting thewire spring 140 and the end of the coil member 181 by fixing the end ofthe coil member 181, together with the wire spring 140, to the firstcopperplate part 151 to which the wire spring 140 is penetrativelyfixed.

Meanwhile, the first substrate 150 is formed with an avoid groove 152 inwhich the end of the coil member 181 is disposed when fixing the end ofthe coil member 181 to the first copperplate part 151.

The avoid groove 152 is formed as the outer surface of the firstsubstrate 150 is depressed inwardly, and the size of this avoid groove152 is greater than the diameter of the end of the coil member 181.

By forming the avoid groove 152 in which the end of the coil member 181is disposed and making the size of the avoid groove 152 greater than thediameter of the end of the coil member 181 as described above, it ispossible to insert the end of the coil member 181, which is disposedbelow the first substrate 150, in the avoid groove 152 and thus preventthat the end of the coil member 181 is interfered with the base 110 uponmovement of the lens holder 120.

The upper magnet 182 and the lower magnet 183 are formed in a hexahedralshape and two-pole magnetized in up and down direction.

Also, the upper magnet 182 is inserted in the upper fixation part 131 ofthe cover 130, and the lower magnet is inserted in the lower fixationpart 111 of the base 110.

These upper magnet 182 and lower magnet 183 are disposed adjacently tothe side surface of the coil member 181, and same polarities of themface to each other to form a magnetic field.

The iron piece member 184 has a hexahedral shape, where one end thereofis inserted between the upper magnet 182 and the lower magnet 183 andthe other end is inserted in the center of the coil member 181.

That is, the one end of the iron piece member 184 is in contact with thelower surface of the upper magnet 182 and the upper surface of the lowermagnet 183, and the other end is formed projecting toward the coilmember 181 to be adjacent to the coil member 181.

Next, operation of the photography device constituted as described abovewill be described.

In general, the control unit 170 supplies power to the coil member 181to correct shake when the camera senses the shake using a gyro-sensormounted in the camera.

Therefore, the coil member 181 is electrically connected with thecontrol unit 170 via the second substrate 160, the wire spring 140 andthe first substrate 150, and receives power from the control unit 170 tomove the lens holder 120 in a horizontal direction.

As illustrated in FIG. 14, as the lens holder 120 move to the right, thelower end of the wire spring 140 moves to right of the upper end of thewire spring 140 and thus the wire spring 140 leans to the right.

At this time, the end mounted to the lens holder 120 moves to the righttogether with the lens holder since it is fixed to the first substrate150 together with the lower end of the wire spring 140.

That is, since the coil member 181 moves together with the lens holder120 upon the horizontal movement of the lens holder 120, the end of thecoil member 181 hardly moves.

By connecting the drive member 180 with the lower end of the wire spring140 to electrically connect the drive member 180 with the wire spring140 as described above, it is possible to minimize the external forceapplied to the drive unit 180 upon the horizontal movement of the lensholder 120 while the drive member receives the power via the wire spring140.

Hereinafter, a third embodiment of the present invention will bedescribed.

FIG. 16 is a perspective view illustrating a photography device withanti-shake function in accordance with a third embodiment of the presentinvention; FIG. 17 is an exploded perspective view illustrating thephotography device of FIG. 16; and FIG. 18 is a partially enlargedexploded perspective view of ‘D’ in FIG. 17.

As illustrated in FIGS. 16 to 18, the photography device of the thirdembodiment includes a housing 1200, a holder 1300, a lens unit 1400, afirst coil member 1410, a second coil member 1310, a magnet 1500, a ironpiece member 1600, a first elastic member 1420, a power terminal 1430and a second elastic member 1320.

The housing 1200 has a rectangular shape and is formed separately intoan upper part and a lower part, of which edges projects toward eachother to enclose the holder 1300.

The holder 1300 has a hollowed rectangular shape and mounted movably ina horizontal direction in an inside of the housing 1200.

A side surface of the holder 1300 is formed with a through hole 1301opened to communicate the inside and the outside of the holder 1300.

The through hole 1301 has a rectangular shape, and is formed on each offour side surfaces of the holder 1300.

Also, both sides of the through hole 1301 are formed with a fixingprojection 1302 projecting toward the magnet 1500, respectively.

In the inside of this holder 1300, the lens unit 1400 is mounted movablyin the up and down direction.

The lens unit 1400 has a hollowed cylindrical shape, and a pluralitylenses (not shown) for adjusting the magnification of an object ismounted in the inside of the lens unit 1400.

Also, the outer peripheral surface of the lens unit 1400 is mounted withthe first coil member 1410.

The first coil member 1410 is one made by winding a thin wire flowingcurrent through the inside thereof around the outer peripheral surfaceof the lens unit 1400.

That is, the first coil member 1410 surrounds the outer peripheralsurface of the lens unit 1400 in a direction rotating around the opticalaxis of the lens.

This first coil member 1410 forms a first electromagnetic field (notshown) in the vicinity thereof to move the lens unit 1400 up and downwhen the power is applied.

Meanwhile, the outer surface of the holder 1300 is mounted with thesecond coil member 1310.

The second coil member 1310 is one made by winding a thin wire flowingcurrent through the inside thereof parallel to the outer surface of theholder 1300, and is formed in a hollowed cylindrical shape.

Also, the second coil member 1310 is mounted on the outer surface of theholder 1300 such that a pair of the second coil members 1310 is oppositeto each other.

That is, two second coil members 1310 are respectively disposed on theopposite outer surfaces of the holder 1300 to form a pair, and total twopairs of the second coil members 1310 are mounted on the outer surfaceof the holder 1300.

Also, the second coil member 1310 is inserted around the fixingprojection 1302 formed on the outer surface of the holder 1300.

That is, two fixing projections 1302 formed at both sides of the throughhole 1301 is inserted in a hollow part 1311 penetratively formed in thecenter of the second coil member 1310 so that the hollow part 1311 ofthe second coil member 1310 is communicated with the through hole 1301.

This second coil member 1310 forms a second electromagnetic field (notshown) in the vicinity thereof to move the lens unit 1300 horizontallywhen the power is applied.

Meanwhile, the magnet 1500 is mounted on the side surface of the housing1200 and disposed adjacently to the second coil member 1310.

The magnet 1500 has a rectangular shape and is two-pole magnetized in upand down direction, and total 8 magnets are mounted on the side surfaceof the housing, two on each side surface.

Specifically, the side surface of the housing 1200 that is formedseparately into upper part and lower part is respectively formed with aninsertion groove 1210 into which the magnet 1500 is inserted.

The magnets 1500 are mounted in these insertion grooves 1210, one ineach insertion groove 1210, so that the magnets 1500 are disposedseparately into upper and lower sides.

Also, between the magnets 1500 disposed separately into upper and lowersides, the iron piece member 1600 is mounted.

That is, the magnets 1500 are mounted one on each of upper and lowerends of the iron piece 1600.

Also, the magnets 1500 are disposed such that they have the samepolarity on the sides abutting to the iron piece member 1600.

That is, if the lower end of the magnet 1500 disposed on the upper sideof the iron piece member 1600 is the N pole, the upper end of the magnet1500 disposed on the lower side of the iron piece member 1600 is alsothe N pole.

By making the magnets 1500 in contact with the iron piece member 1600having the same polarity, the magnetic field generated by the magnet1500 comes to be parallel to the second electromagnetic field generatedwhen the power is applied to the second coil member 1310.

This iron piece member 1600 mounted between the magnets 1500 has arectangular shape and is made of a ferromagnetic metal material.

Specifically, one end of the iron piece member 1600 is disposed betweenthe magnets 1500, and at this time, it is magnetized as it comes to bein contact with the magnet 1500.

Also, the other end of the iron piece member 1600 is formed projectingtoward the holder 1300 and passes through the second coil member 1310 tobe adjacent to the first coil member 1410.

That is, the other end of the iron piece member 1600 passes throughbetween the fixing projections 1302 on which the second coil member 131is inserted and penetratively inserted in the hollow part 1311 of thesecond coil member 1310, and is adjacent to the first coil member 1410through the through hole 1301 of the holder 1300, which is communicatedwith the hollow part 1311.

By penetratively inserting the iron piece member 1600 in the second coilmember 1310, it is possible to induce the magnetic field generated bythe magnet 1500 to the second coil member 1310 via the iron piece member1600.

Also, by penetratively inserting the iron piece member 1600 in thethrough hole 1301 of the holder 1300, it is possible to enable that theiron piece member 1600 passes through the second coil member 1310 to beadjacent to the first coil member 1410.

Meanwhile, the first elastic member 1420 is mounted to the lower end ofthe lens unit 1400 to elastically support the lens unit 1400 in the upand down direction.

Specifically, the first elastic member 1420 is made of a thin plateparallel to the holder 1300, and the surface of the first elastic member1420 is coated with a metal material so as to allow flow of electricity.

Also, the first elastic member 1420 includes a first fixation part 1421fixed to the lens unit 1400, a second fixation part 1422 fixed to theholder 1300 and an elastic part 1423 formed between the first fixationpart 1421 and the second fixation part 1422 and contracted and relaxedupon up and down movement of the lens unit 1400.

Also, the first elastic member 1420 is connected with the power terminal1430 to receive power from the power terminal 1430 to the first coil1430, and is also electrically connected with the first coil member 1410to transfer the power applied from the power terminal to the first coilmember 1410.

The power terminal 1430 is, on the contrary to the first elastic member1420, made of a thin plate perpendicular to the holder 1300.

Specifically, the power terminal 1430 includes a first extension part1431 formed parallel to the outer surface of the holder 1300 and asecond extension part 1432 formed bent from the first extension part1431.

That is, the power terminal 1430 is formed such a shape that a thinplate parallel to the outer surface of the holder 1300 is bent along theouter surface of the holder 1300.

As the power terminal 1430 connected with the first elastic member 1420includes the second extension part 1432 formed bent from the firstextension part 1431 as described above, an angle between the firstextension part 1431 and the second extension part 1432 of the powerterminal 1430 is decreased or increased upon the horizontal movement ofthe holder 1300 to minimize the external force applied to the holder1300 by the power terminal 1430.

Like the lens unit 1400, the holder 1300 is mounted with the secondelastic member 1320 that elastically supports the holder 1300 in thehorizontal direction.

The second elastic member 1320 is made of a thin and long wire, and anupper end thereof is fixed to the upper side of the housing 1200 and alower end is mounted to the lower side of the holder 1300.

The second elastic member 1320 is made of metal material through whichelectricity flows, and is connected with the second coil member 1310 totransfer power to the second coil member 1310.

By connecting the second elastic member 1320 that elastically supportsthe holder 1300 with the second coil member 1310 and transferring powerto the second coil member 1310, it is possible to supply the power tothe second coil member 1310 without separate power transfer means andthus reduce the number of parts and facilitate assembly.

Also, the second elastic member 1320 is provided in plural, and ismounted one on each of four symmetric positions of the holder 1300 tosupport the holder 1300 so that the holder can keep horizon.

At this time, the second elastic member 1320 is connected with thesecond coil member 1310 mounted on the outer surface of the holder 1300to transfer the power, and applies the same power to the second coilmember 1310 mounted on the outer surface of the holder 1300 such that apair of the second coils 1310 are opposite to each other.

That is, the same power is applied to two coil members 1310 disposed onthe moving line of the holder 1300 upon the horizontal movement of theholder 1300.

By applying the same power to the second coil members 1310, a pair ofwhich is disposed on the outer surface of the holder in opposite to eachother, it is possible to apply the force of the same direction to theholder 1300 upon the horizontal movement of the holder 1300 and thusenhance the driving force.

Operation of the photography device in accordance with the thirdembodiment of the present invention constituted as described above willbe described in detail.

FIGS. 19 to 21 are sectional views taken along a line B-B in FIG. 16;FIG. 22 is a sectional view taken along a line C-C in FIG. 16.

As illustrated in FIG. 19, before the power is applied to the first coilmember 1410 and the second coil member 1310, the lens unit 1400 and theholder 1300 are mot moved arbitrarily since they are supported by thefirst elastic member 1420 and the second elastic member 1320.

Also, the first elastic member 1420 keeps the horizontal state and thesecond elastic member 1320 keeps the vertical state.

FIG. 20 illustrates the operation state when applying power to the firstcoil member 1410.

As illustrated in FIG. 20, when the power is applied to the first coilmember 1410, the first electromagnetic field is formed in the vicinityof the first coil member 1410, and the first electromagnetic field liftsthe lens unit 1400 by an interaction with the magnetic field generatedin the magnet 1500 and induced through the iron piece 1600.

The lens unit 1400 relaxes the first elastic member 1420 upwardly whileit ascends.

At this time, the holder 1300 is supported by the second elastic member1320 and thus does not ascend.

Meanwhile, if the direction of the power applied to the first coilmember 1410 is inversed, the direction of the first electromagneticfield generated in the first coil member 1410 is inversed and the lensunit 1400 descends.

At this time, by the elastic restoring force of the first elastic member1420, the lens unit 1400 moves to the initial position and iselastically supported so as not to ascend arbitrarily.

FIG. 21 illustrates the operation state when applying power to thesecond coil member 1310.

As illustrated in FIG. 21, when the power is applied to the second coilmember 1310, the second electromagnetic field is formed in the vicinityof the second coil member 1310, and the second electromagnetic fieldmoves the holder 1300 horizontally to the left by an interaction withthe magnetic field generated in the magnet 1500 and induced through theiron piece 1600.

The holder 1300 relaxes and leans the second elastic member 1320 to theleft while it moves to the left.

Also, the lens unit 1400 and the first elastic member 1420 mounted tothe holder 1300 move together horizontally to the left

At this time, as illustrated in FIG. 22, the power terminal 1430connected with the first elastic member 1420 disperses the force so asto minimize the external force which is interfered with the holder 1300while the angle between the first extension part 1431 and the secondextension part 1432 is decreased or increased.

That is, as illustrated in FIG. 22(1 a), the first extension part andthe second extension part 1432 are kept to be perpendicular to eachother before the holder 1300 moves, and as illustrated in FIG. 22(1 b),the angle between the first extension part 1431 and the second extensionpart 1432 is decreased or increased to disperse the force when theholder 1300 moves to the left.

By making the magnetic field generated by the magnet 1500 interactingwith both the first electromagnetic field and the second electromagneticfield via the iron piece member 1600, it is possible to unify the magnet1500 for up and down movement of the lens unit 1400 and the horizontalmovement of the holder 1300 and thus decrease the number of theelements, facilitates assembly and reduce the overall size.

FIG. 23 is a perspective view illustrating a photography device withanti-shake function in accordance with a fourth embodiment of thepresent invention; FIG. 24 is an exploded perspective view illustratingthe photography device of FIG. 23, viewed from one direction; and FIG.25 is an exploded perspective view illustrating the photography deviceof FIG. 23, viewed from another direction.

FIG. 26 is a view illustrating a state of coupling first and secondblades with a first elastic member in the fourth embodiment; and FIG. 27is a view illustrating a state of coupling a first housing and a firstpower connection member with the first elastic member in the fourthembodiment.

As illustrated in FIGS. 23 to 27, the photography device of the fourthembodiment includes a housing 2100, a magnet 2200, a yoke member 2300, afirst blade 2400, a first coil member 2450, a first elastic member 2500,a first power connection member 2600, a second blade 2700, a second coilmember 2750, a second elastic member 2800 and a second power connectionmember 2900.

The housing has a hexahedral shape, and includes a first housing 2110which is separated upwardly from the first blade 2400 and a secondhousing 2120 which is separated downwardly from the first blade 2400.

The first housing 2110 has a rectangular plate shape and each of theside surface in the vicinity of the corner projects downwardly, and thesecond housing 2120 has a rectangular plate shape and each of the sidesurface in the vicinity of the corner projects upwardly to be coupledwith the side surface of the first housing 1210.

Also, a cover 2180 that encloses the upper surface of the first housing2110 and the side surfaces of the first housing 2110 and the secondhousing 2120 is mounted on the outside of the housing 2110 to protectthe housing 2100.

Also, the first housing 2110 and the second housing 2120 arerespectively formed with an opening 2130 for passing the incident lightof the lens therethrough, and the side surface of the first housing isformed with a guide groove 2140 for inserting a connection part 2611 ofthe first power connection member 2600 therein.

The guide groove 2140 has a rectangular shape, and is formed on each oftwo symmetric side surfaces of the first housing 2110.

Also, on both sides of the guide groove 2140 in a lower part of thefirst housing 2110, a stopping projection 2150 that projects downwardlyis formed.

Also, the magnet 2200 is inserted in the side surface of the firsthousing 2110 and the side 2120 of the second housing 2120.

The magnet 2200 has a rectangular shape, and total 8 magnets 2200 aredisposed, four on each of the first housing 2110 and the second housing2120 oppositely to each other in up and down direction.

Also, between the magnet 2200 disposed on the first housing 2110 and themagnet 2200 disposed on the second housing 2120, the yoke member 2300 ismounted.

The polarities of the magnet 2200 is formed in an up and down direction,and the magnets respectively mounted on the first housing 2110 and thesecond housing 2120 are disposed so that their polarities are symmetricwith respect to the yoke member 2300.

Also, if the magnet 2110 disposed on the first housing 2110 has theupwardly disposed S pole and downwardly disposed N pole, the magnet 2110disposed on the second housing 2120 has the downwardly disposed S poleand upwardly disposed N pole.

The yoke member 2300 having a rectangular shape is made of aferromagnetic material and mounted on the side surface of the housing2100 so that its upper and lower surfaces are in contact with themagnets 2200.

This yoke member 2300 is formed with a magnetism inducement projection2310 that induces the magnetic field of the magnet 2200 in apredetermined direction.

The magnetism inducement projection 2310 projects towards the first coilmember 2450 as will be described later, and is adjacent to the firstcoil member 2450 to induce the magnetic field of the magnet 220 towardsthe first coil member 2450.

Also, the first blade 2400 and the second blade 2700 are mounted in theinside of the housing 2100.

Specifically, the second blade 2700 has a hollowed hexahedral shape andthe inside thereof is mounted with the first blade 2400.

Also, the second blade 2700 includes a support member 2710 that is incontact with the lower surface of the first blade 2400 to support thefirst blade 2400 so that the first blade 2400 does not move downwardly

The support member 2710 is fixed to the lower side of the second blade2700, and if necessary, may be formed integrally with the second blade2700.

Also, the outer surface of the second blade is mounted with the secondcoil member 2750.

The second coil member 2750, which is a wire flowing current through theinside thereof, is wound in a direction perpendicular to the windingdirection of the first coil member 2450 as will be described later andtotal four are mounted, one on each side surface of the second blade2700.

Also, the second blade 2700 is mounted movably in a horizontal directionto the lower part of the first housing 2110 by the second elastic member2800.

The second elastic member 2800 is made of a wire spring, and one endthereof is mounted to the first housing 2110 and the other end ismounted to the support member 2710 of the second blade 2700 toelastically support the second blade 2700 with floating the secondblade.

Total four second elastic members 2800 are mounted to the support member2800 such that they are symmetric with respect to a diagonal direction.

Also, the second elastic member 2800 is made of material through whichelectricity flows, and is electrically connected with the second coilmember 2750 to transfer power to the second coil member 2750.

Specifically, the second power connection member 2900 that iselectrically connected with the second coil member 2750 is mounted belowthe second blade 2700.

The second power connection member 2900 has a rectangular shape, ofwhich center is opened in an up and down direction, and each cornerthereof is formed with a copper foiled hole 2910 at which the secondelastic member 2800 and the second coil member 2750 are electricallyconnected.

The copper foiled hole 2910 allows well adhesion of conductive adhesivesuch as lead and paste to facilitate the connection of the secondelastic member 2800 with the second coil member 2750.

The second elastic member 2800 can transfer the power of the first powerconnection member 2600 to the second coil member 2750 as its one end ismounted to the first housing 2110 to be electrically connected with thefirst power connection member 2600 and the other end is mounted to thesupport member 2710 to be electrically connected with the second powerconnection member 2900 as described above.

Also, the second elastic member 2800 gives effect of reducing the numberof total elements and simplifying the structure since it elasticallysupports the second blade 2700 in the up and down direction andtransfers the power to the second coil member 2750.

Meanwhile, the first blade 2400 has a hexahedral shape and the centerthereof is formed with a hole opened in an up and down direction andmounted with a lens.

Also, the outer surface of the first blade 2400 is mounted with thefirst coil member 2450.

The first coil member 2450 is an electric wire through which electricityflows and is wound around the outer surface of the first blade 2400.

Also, the first coil member 2450 abuts to the magnetism inducementprojection 2310 of the yoke member 2300.

Specifically, the magnetism inducement projection 2310 formed projectingtowards the first coil member 2450 from the yoke member 2300 mounted tothe side surface of the first housing 2110 passes through the secondcoil member 2759 mounted to the side surface of the second blade 2700and the side surface of the second blade 2700 to be adjacent to thefirst coil member 2450.

This first coil member 2450 moves the first blade 2400 up and down by aninteraction of the electromagnetic field generated upon power apply withthe magnetic field of the magnet 2200 induced via the magnetisminducement projection 2310 to adjust the focus to an object incident tothe lens mounted to the first blade 2400.

By forming the magnetism inducement projection 2310 on the yoke member2300, which passes through the second coil member 2300 and the secondblade 2700 to be adjacent to the first coil member 2450, it is possibleto enable the horizontal movement and the up and down movement with asingle magnet 2200 without a separate magnet.

Also, the first elastic member 2500 is mounted to the upper side of thefirst blade 2400, and a third elastic member 2560 is mounted to thelower side to support the first blade 2400 in the up and down direction.

The third elastic member 2560 has a thin plate shape and an outer sidethereof is mounted to the support member 2710 and an inner side ismounted to the lower side of the first blade 2400 to elastically supportthe first blade 2400 in the up and down direction.

The first elastic member 2500 has a thin plate shape, as illustrated inFIG. 26, and made of a material through which electricity flows, and anouter side thereof is mounted to the upper side of the second blade 2700and an inner side is mounted to the upper side of the first blade 2400to allow up and down movement of the first blade 2400 in the inside ofthe second blade 2700.

Also, the outside of the first elastic member 2500 mounted to the upperside of the second blade 2700 is fixed by welding or adhesive, theinside of the first elastic member 2500 mounted to the upper side of thefirst blade 2400 is in contact with a spacer member 2550 to be in closecontact with and fixed to the first blade 2700.

The outside and the inside of the first elastic member 2500 areconnected elastically, so that the first elastic member can becontracted and relaxed in an up and down direction.

This first elastic member 2500 is formed separately into two sides withrespect to the first blade 2400, and the outside of the separated firstelastic member 2500 is formed with a contact projection 2510 that iselectrically connected with the first power connection member 2600.

The contact projection 2510 has a long rectangular shape, and thecentral part is bent towards the first power connection member 2600 tobe in contact with the first power connection member 2600.

Also, as illustrated in FIG. 26, one end of the contact projection 2510is integrally connected with the first elastic member 2500 and the otherend is bent once again so as to be parallel to the first elastic member2500 and thus is laid freely on the upper surface of the first blade2400.

When the bent part of this contact projection 2510 is presseddownwardly, the bent part is relaxed and the contact projection 2510 iselastically supported toward the first power connection member 2600 bythe elastic restoring force of the bent part to be in contact with thefirst power connection member 2600.

Since the contact projection 2510 is formed in the first elastic member2500 and bent toward the first power connection member 2600 to be incontact with the first power connection member 2600 such that one endthereof is connected with the first elastic member 2500 and the otherend is laid free, even when the heights of the first elastic member 2500and the first power connection member 2600 are different the contactprojection 2510 is easily contracted and relaxed to facilitateconnection of the first elastic member 2500 with the first powerconnection member 2600 and the elasticity of the contact projection 2510is weakened to minimize friction with the first power connection member2600.

Meanwhile, the first power connection member 2600 is connected with anexternal power source to supply power to the first coil member 2450 andthe second coil member 2750.

Specifically, the first power connection member 2600 has a thinrectangular plate shape and is made of a FPCB, and is mounted to theupper side of the first housing 2110.

Both sides of the first power connection member 2600 are projected witha contact terminal 2610 that is in contact with the contact projection2510, respectively.

The contact terminal 2610 is bent towards the lower side of the firsthousing 2110 from the first power connection member 2600 such that itcovers the side surface of the first housing 2110, and one surfacethereof is in contact with the lower surface of the first housing 2110and the other surface is in contact with the contact projection 2510 toelectrically connect the first power connection member 2600 and thefirst elastic member 2500.

Since the first power connection member 2600 disposed in the up and downdirection of the first elastic member 2500 to supply the power to thefirst coil member 2450 is further included and the contact projection2510 is formed in the first elastic member 2500 to electrically connectthe first elastic member 2500 with the first power connection member2600, it is possible to connect the first elastic member 2500 directlywith the first power connection member 2600 without addition of aseparate element for power connection and thus facilitate assembly andsimplify the overall structure.

Also, while the contact terminal 2610 is subject to an upward externalforce by the contact projection 2510 when it comes into contact with thecontact projection 2510, the contact terminal 2610 is not bent or movedsince it is in contact with and supported by the lower surface of thefirst housing 2110.

If necessary, the contact terminal 2610 may be formed in the firstelastic member 2500 and the contact projection 2510 is formed in thefirst power connection member 2600.

Since the contact terminal 2610 which is bent towards the lower side ofthe first housing 2110 such that one surface thereof is in contact withthe lower surface of the first housing 2110 and the other surface is incontact with the contact projection 2510, is formed in the first powerconnection member 2600, the contact terminal 2610 is supported by thelower surface of the first housing 2110 to thereby prevent the contactterminal 2610 from being bent when it comes into contact with thecontact projection 2510 and improve the contact force between thecontact terminal 2610 and the contact projection.

Also, the contact terminal 2610 includes the connection part 2611 thathas a width smaller than the width of the guide groove 2140 and acopperplate part 2612 that extends from the connection part 2611 and hasa width greater than the width of the guide groove 2140.

The connection part 2611 is made of a flexible material and thus iseasily bendable, and is bent towards the lower side of the first housing2110 so as to penetratively inserted in the guide groove 2140 and coverthe side surface of the first housing 2110.

At this time, the connection part 2611 is spaced a predetermineddistance apart from the side surface of the first housing 2110 formedwith the guide groove 2140 so as not to be in contact with the sidesurface of the first housing 2110, and is bent softly to prevent theconnection part 2611 from being damaged.

The copperplate part 2612 is made of a material through which currentflows, and thus the external power is transferred to the contactprojection 2510 when the copperplate part 2612 comes into contact withthe contact projection 2510.

Also, the width of the copperplate part 2612 is greater than the movingdistance of the contact projection 2510 and thus the contact projection2510 is always in contact with the copperplate part 2612 even when thecontact projection moves horizontally.

Also, the side surface of the copperplate part 2612 is in contact withthe side surface of the stopping projection 2150 formed in both sides ofthe guide groove 2140.

The stopping projection 2150 projects downwardly more than thecopperplate part and has a width narrower than the width of thecopperplate part 2160 like the guide groove 2140, and therefore thecopperplate part 2612 comes into contact with the stopping projection2150 when the copperplate part 2612 moves in a horizontal direction.

By forming the stopping projection 2150 that projects downwardly and isin contact with the side surface of the copperplate part 2612 in bothsides of the groove 2140 as described above, it is possible to stop thecopperplate part 2612 from moving in a lateral direction and thusprevent departure of the copperplate part 2612 from the guide groove2140.

Next, operation of the photography device in accordance with the fourthembodiment will be described.

FIGS. 28 and 29 are sectional views taken along a line B-B in FIG. 23;FIGS. 30 and 31 are sectional views taken along a line C-C in FIG. 23

As illustrated in FIG. 28, before the first blade 2400 moves up anddown, the lower surface of the first blade 2400 is in contact with theupper surface of the support member 2710 to be blocked from moving downand the magnetism inducement projection 2310 is disposed slightly belowthe center of the first coil member 2450.

Also, the first elastic member 2500 is mounted to the upper side of thefirst blade 2400 to elastically support the first blade 2400 so that thefirst blade 2400 does not move upwardly.

Also, the copperplate part 2612 of the contact terminal 2610 is incontact with and supported by the lower surface of the cover so that itis not bent in the up and down direction, and is also in contact withthe contact projection.

As illustrated in FIG. 29, when the power is applied to the first coilmember 2450, the first blade 2400 move upwardly by the interaction ofthe electromagnetic field generated in the first coil member 2450 withthe magnetic field induced from the magnetism inducement projection2310.

The first blade 2400 moves until the magnetism inducement projection2310 comes into contact with the lower side of the first coil member2450, and the inside of the first elastic member 2500 does not move asit is fixed to the second blade 2700 but the outside fixed to the firstblade 2400 moves upwardly together with the first blade 2400.

Therefore, the first elastic member 2500 is relaxed between the insideand the outside thereof, and the first elastic member 2500 elasticallysupports the first blade downwardly by its elastic restoring force.

Also, the contact projection 2510 is continuously in contact with thecontact terminal 2610 since it is disposed outside the first elasticmember 2500 and does not move.

Also, when the direction of the power applied to the firs coil member isinversed, the first blade 2400 moves downwardly until the first blade2400 comes into contact with the support member 2710.

Meanwhile, as illustrated in FIG. 30, before the second blade 2700 moveshorizontally, the second blade 2700 is hung on the second elastic member2800 and thus is floated above the base and the second elastic member2800 is maintained vertical and the magnetism inducement projection 2310is disposed in the center of the second coil member 2750.

Also, the contact projection 2510 is disposed in the horizontal centerof the contact terminal 2610 and the bent part is in contact with thecontact terminal 2610 to be electrically connected with the first powerconnection member.

Also, the second elastic member 2800 is connected with the first powerconnection member 2600 at the upper end thereof and connected with thesecond power connection member 2900 together with the end the secondcoil to transfer power of the first power connection member 2600 to thesecond coil member 2750.

As illustrated in FIG. 31, when the power is applied to the second coilmember 2750, the second blade 2700 moves horizontally to the lefttogether with the second coil member 2750, the second power connectionmember 2900 and the lower end of the second elastic member 2800.

One end of the second elastic member 2800 is mounted to the firsthousing 2110 and thus does not move, and the other end is mounted to thesupport member 2710 of the second blade 2700 and thus moves and extendsto the left.

This second elastic member 2800 elastically supports the second blade2700 to the right by its elastic restoring force.

Also, the contact projection 2510 moves horizontally to the left withbeing in contact with the contact terminal 2610 to continuously keep theelectrical connection of the first elastic member 2500 with the firstpower connection member 2600.

Also, depending on the direction of the power applied to the second coilmember 2750, movement to the right is enabled and horizontal movement inforward and rearward direction is also enabled.

As the first elastic member moves together with the second blade 2700with the first elastic member 2500 being in contact with the first powerconnection member 2600 by the contact projection upon the horizontalmovement of the second blade 2700, interference with the first elasticmember 2500 and the first power connection member 2600 is reduced uponthe horizontal movement of the second blade 2700 and thus the horizontalmovement of the second blade 2700 is facilitated.

FIG. 32 is a perspective view illustrating a photography device withanti-shake function in accordance with a fifth embodiment of the presentinvention; FIG. 33 is an exploded perspective view illustrating thephotography device of FIG. 32, viewed from one direction; and FIG. 34 isan exploded perspective view illustrating the photography device of FIG.32, viewed from another direction.

FIG. 35 is a sectional view taken along a line B-B in FIG. 32.

As illustrated in FIGS. 32 to 35, the photography device of the fifthembodiment includes a housing 3100, a first blade 3200, a first coilmember 3250, a second blade 3300, a second coil member 3350, a base3400, a magnet 3500, a yoke member 3600, a first elastic member 3700 anda second elastic member 3800.

The housing 3100 has a hexahedral shape with opened upper and lowerparts, and the first blade 3200 is disposed movable up and down in theinside of the housing 3100.

Also, an upper side of the housing 3100 is mounted with the firstelastic member 3700 and a cover 3150 and a lower side of the housing3100 is mounted with the base 3400.

The cover 3150 has a rectangular shape and has the center part opened inan up and down direction to pass the incident light of the lenstherethrough.

The first blade 3200 has a hexahedral shape with an opened lower partand an upper part formed with an opening hole 3210 for passing theincident light of the lens therethrough, and the outside of the firstblade 3200 is mounted with the first coil member 3250.

The first coil member 3250 is an electric wire through which electricityflows and is wound around the outer surface of the first blade 3200.

At this time, the outer corner part of the first blade 3200 is chamferedto prevent the first coil member 3250 from being damaged.

Also, the second blade 3300 is mounted in the inside of the first blade3200 movably in a horizontal direction by the second elastic member3800.

The cover 3300 has a rectangular shape and has the center part opened inan up and down direction to insert the lens therein.

Also, the side surface of the second blade 3300 is mounted with thesecond coil member 3350.

The second coil member 3350 is an electric wire through whichelectricity flows and is wound in a direction perpendicular to thewinding direction of the first coil member 3250.

Total four second coil members 3350 are mounted on the side surface ofthe second blade 3300, and they are disposed symmetrically with respectto the optical axis of the lens 3300.

Meanwhile, the base 3400 is mounted to the lower side of the housing3100 and has a rectangular shape with the center part opened in an upand down direction.

An upper side of the base 3400 is mounted with the magnet 3500 and theyoke member 3600.

The magnet 3500 has a hexahedral shape and a plurality of the magnets isdisposed symmetrically with respect to the first blade 3200.

Also, the magnet 3500 is mounted between the first blade 3200 and thesecond blade 3300 such that one surface thereof is disposed towards thefirst coil member 3250 and the other surface is disposed towards thesecond coil member 3350.

That is, as illustrated in FIG. 35, one surface of the magnet 3500 isdisposed facing the inner surface of the first blade 3200 to be adjacentto the first coil member 3250 mounted on the outer surface of the firstblade 3200, and the other surface is disposed facing the second coilmember 3350 to be adjacent to the second coil member 3350.

As the magnet 3500 is fixed to the base such that one surface thereof isdisposed towards the first coil member 3250 and the other surface isdisposed towards the second coil member 3350 as described above, a gapbetween the first coil member 3250 and the magnet 3500 is reduced andthus overall structure and size are simplified.

Also, total 8 magnets 3500 are provided, two on each side surface of thefirst blade 3200 and divided into a first magnet 3510 that is in contactwith the upper surface of the yoke member 3600 and a second magnet 3520that is in contact with the lower surface of the yoke member 3600.

The first magnet 3510 and the second magnet 3520 are disposed such thattheir polarities are formed in an up and down direction and aresymmetric with respect to the yoke member 3600, respectively.

That is, the polarities of the first magnet 3510 that is in contact withthe upper surface of the yoke member 3600 are disposed such that the Spole is disposed in the upper direction towards the upper side and the Npole is disposed towards the lower side, and the polarities of thesecond magnet 3520 that is in contact with the lower surface of the yokemember 3600 are disposed such that the N pole is disposed in the upperdirection towards the upper side and the S pole is disposed towards thelower side.

The yoke member 3600 having a hexahedral shape is made of a magneticmaterial and mounted on the upper side of the base 3400 so that itsupper surface is in contact with the first magnet 3510 and the lowersurface is in contact with the second magnet 3520.

Also, total four yoke members 3600 are provided, one on each sidesurface of the first blade 3200.

Also, the yoke member 3600 is, as illustrated in FIG. 35, disposedbetween the first blade 3200 and the second blade 3300 such that onesurface thereof is disposed towards the first coil member 3250 to beadjacent to the first coil member 3250 and the other surface is disposedtowards the second coil member 3350 to be adjacent to the second coilmember 3350.

As The magnet 3500 is disposed such that its polarities are symmetricwith respect to the yoke member 3600 the yoke member 3600 is disposedsuch that one surface thereof is disposed towards the first coil member3250 and the other surface is disposed towards the second coil member3350 as described above, overall structure is simplified and themagnetic field of the magnet 3500 is sufficiently transferred to thefirst coil member 3250 and the second coil member 3350 to smoothen themovement of the first blade 3200 and the second blade 3300.

This yoke member 3600 is formed with a magnetism inducement projection3610 that projects towards the second coil member 3350 and inserted inthe center of the second coil member 3350.

The magnetism inducement projection 3610 has a rectangular shape andformed smaller than the width of the yoke member 3600, and is insertedin the center of the second coil member 3350 so that it is adjacent tothe inner surface of the second coil member 3350.

This yoke member 3610 functions to induce the magnetic field, which isgenerated from the magnet 3500 disposed upper and lower side of the yokemember 3600, towards the second coil member 3350.

By forming the magnetism inducement projection 3610 that projectstowards the second coil member 3350 and inserted in the center of thesecond coil member 3350 as described above, the magnetic field of themagnet 3500 can be induced well towards the second coil member 3350.

Also, the first magnet 3510 that is in contact with the upper surface ofthe yoke member 3600 is disposed at a height similar to that of theupper surface of the first blade 3200 and inserted in a through hole3220 formed in the upper side of the first blade 3200.

The through hole 3220 has a rectangular shape and is formed greater thanthe width of the magnet 3500, and total four through holes 3220 areformed symmetrically with respect to the opening hole 3210.

By forming the through hole 3220, into which the magnet 3500 ispenetratively inserted upon the up and down movement of the first blade3200, in the upper side of the first blade 3200 as described above, itis possible to reduce the size of the first blade 3200 and facilitatethe up and down movement of the first blade 3200 with avoiding themagnet.

Meanwhile, the second blade 3300 is mounted with a third elastic member3790 and the second elastic member 3800.

The third elastic member 3790 has a thin plate shape and an outer sidethereof is mounted to the base 3400 and an inner side is mounted to thelower end of the second blade 3300 to elastically support the secondblade 3300 in an up and down direction.

The second elastic member 3800 is made of a wire spring formed long inan up and down direction, and one end thereof is coupled and fixed tothe upper end of the first blade 3200 and the other end is coupled andfixed to the lower end of the second blade 3300 to elastically supportthe second blade 3300 so that the second blade 3300 moves horizontallyin the inside of the first blade 3200.

Also, the second elastic member 3800 is made of a material through whichelectricity flows, and is electrically connected with an end of thesecond coil member 3350.

Total four second elastic members 3800 are mounted on the lower end ofthe second blade 3300, and they are disposed symmetrically with respectto the optical axis of the lens.

Also, the first blade 3200 is mounted with the first elastic member3700.

The first elastic member 3700 has a thin plate shape, and an outer sidethereof is coupled and fixed to the upper side of the housing 3100 andan inner side is coupled and fixed to the upper side of the first blade3200.

The outside and the inside of the first elastic member 3700 areconnected elastically, so that the first elastic member can becontracted and relaxed in an up and down direction to elasticallysupport the first blade 3200 movably up and down in the inside of thehousing 3100.

Also, the side surface of the first elastic member 3700 is formed with aterminal part 3750 which is bent toward the side surface of the housing3100 and connected to the external power source, and the terminal partis connected with the external power source and functions to supplypower to the first coil member 3250 and the second coil member 3350.

Specifically, the first elastic member 3700 includes a conductor layer(not illustrated) which is connected with the external power source tosupply power to the first coil member 3250 and the second coil member3350 and an insulation layer which coats the conductor layer.

The conductor layer consists of a plurality of electric circuits fortransferring power to the first coil member 3250 or the second elasticmember 3800, and is electrically connected with the external powersource.

That is, the conductor layer is connected directly with the end of thefirst coil member 3250 to transfer external power to the first coilmember 3250 and is electrically connected with one end of the secondelastic member 38800 to supply the power to the second coil member 3250connected with the other end of the second elastic member 3800.

As one end of the second elastic member 3800 that elastically supportsthe second blade 3300 in a horizontal direction is electricallyconnected with the conductor layer 3800 and the other end iselectrically connected with the end of the second coil member 3350 tosupply the external power to the second coil member 3350 as describedabove, the second elastic member performs both functions of supplyingthe power and elastically supporting the second blade 3300 and thusreduces total number of elements and simplifies the structure.

The insulation layer is made of a material through which electricitydoes not flow, and coats the conductor layer to prevent the conductorlayer from being damaged and cut off external electric noise.

Also, the insulation layer is made of a flexible material and thus iseasily bent and has elasticity.

As the first elastic member that is mounted to the first blade 3200 toelastically support the first blade 3200 in an up and down directionincludes the conductor layer which is connected with the external powersource to supply power to the first coil member 3250 and the second coilmember 3350 and the insulation layer which coats the conductor layer asdescribed above, the first elastic member performs both functions ofsupplying the power and elastically supporting the first blade 3200 andthus reduces total number of elements and simplifies the structure.

Operation of the photography device in accordance with the fifthembodiment constituted as described above will be described.

FIG. 35 is a sectional view taken along a line B-B in FIG. 32; and FIGS.36 and 37 are sectional views illustrating operation state of thephotography device in FIG. 35.

As illustrated in FIG. 35, before the power is applied to the first coilmember 3250 and the second coil member 3350, the first blade 3200 isdisposed with being floated above the base 3400 by the first elasticmember 3700 and the third elastic member 3790 and the first elasticmember 3700 keeps the horizontal state.

Also, the second blade 3300 is disposed with being floated above thebase 3400 in the inside of the first blade 3200 by the second elasticmember 3800.

Also, the gaps between the first coil member 3250 and the outer surfaceof the magnet 3500 are symmetric with respect to the optical axis, andthe gaps between the inner surface of the magnet 3500 and the secondcoil member 3350 are symmetric with respect to the optical axis.

As illustrated in FIG. 36, when the power is applied to the first coilmember 3250, the first blade 3200 ascends by the interaction of thefirst electromagnetic field generated in the first coil member 3250 withthe magnetic field generated in the magnet 3500.

As the first blade 3200 ascends, the first elastic member 3700 isrelaxed upwardly while the inside thereof ascends together with thefirst blade 3200.

Also, the second blade 3300 which is connected with the inside of thefirst elastic member 3700 and also connected with the inside of thefirst blade 3200 by the second elastic member 3800 also ascends togetherwith the ascent of the inside of the first elastic member 3700.

At this time, as illustrated in FIG. 36, since the second blade 3300mounted with the second coil member 3350 moves in an up and downdirection without left and right movement, the gap between the secondcoil member 3350 and the inner surface of the magnet 3500 is notchanged.

Therefore, upon the horizontal movement of the second blade 3300, themagnetic field of the magnet 3500 is uniformly transferred to both thesecond coil members 3350 disposed in both sides of the second blade 3300and thus the horizontal movement of the second blade 3300 is smoothened.

Also, the first coil member 3250 can be moves down when the direction ofthe power applied is inversed.

Meanwhile, when the power is applied to the second coil member 3350 withthe first blade 3200 being ascended, the second blade 3300 moves to theleft independently of the first blade 3200 in the inside of the firstblade 3200.

As the second blade 3300 moves to the left, the second elastic member3800 is deformed towards the left, and the second elastic member 3800elastically supports the second blade 3300 by its elastic restoringforce.

The second blade 3300 is movable to the right or in a forward andrearward direction depending on a direction of the current applied tothe second coil member 3350.

As the magnet 3500 is disposed between the inner surface of the firstblade 3200 and the outer surface of the second blade 3300, the firstblade 3200 and the second blade 3300 move up and down together, and thesecond blade 3300 moves horizontally independently of the first blade3200 as described above, a gap between the second coil member 3350mounted to the second blade 3300 and the magnet 3500 is kept uniformlyupon the up and down movement of the first blade 3200 and thus themagnetic field of the magnet 3500 is uniformly transferred to both thesecond coil members 3350 disposed in both sides of the second blade3300, thereby smoothening thus the horizontal movement of the secondblade 3300.

On the contrary, a gap between the first coil member 3250 and the magnet3500 is kept uniformly upon the horizontal movement of the second blade3300 to smoothen the up and down movement of the first blade 3200.

The photography device with anti-shake function of the present inventionis installed in a compact electronic device such as a hand-held deviceand moves the lens in a direction correcting shake when the shake isgenerated upon photographing of an object to thereby allow the object tobe clearly photographed.

While the present invention has been described with respect to thespecific embodiments, it will be apparent to those skilled in the artthat various changes and modifications may be made without departingfrom the spirit and scope of the invention as defined in the followingclaims.

What is claimed is:
 1. A photography device with anti-shake function,comprising: a housing; a first blade disposed movably in an up and downdirection in an inside of the housing and mounted with a first coilmember in an outside thereof; a second blade disposed horizontallymovably in an inside of the first blade and mounted with a second coilmember in an outside thereof; and a magnet disposed between an innersurface of the first blade and an outer surface of the second blade,wherein the first blade and the second blade moves up and down togetherby interaction of a first electromagnetic field generated when power isapplied to the first coil member with a magnetic field generated in themagnet, and the second blade moves horizontally independently from thefirst blade by interaction of a second electromagnetic field generatedwhen the power is applied to the second coil member with the magneticfield generated in the magnet.
 2. The photography device of claim 1,further comprising: a base mounted to a lower side of the housing,wherein the magnet has one surface disposed towards the first coilmember and the other surface disposed towards the second coil member andfixed to the base, and the first coil member is wound around the firstblade and the second coil member is wound on a side surface of thesecond blade in a direction perpendicular to the winding direction ofthe first coil member.
 3. The photography device of claim 1, furthercomprising: a first elastic member having an outside fixed to thehousing and an inside mounted to the first blade to elastically supportthe first blade in an up and down direction, wherein the first elasticmember includes a conductor layer connected with an external powersource to transfer power to the first coil member and the second coilmember; and an insulation layer which coats the conductor layer.
 4. Thephotography device of claim 3, further comprising: a second elasticmember having one end mounted to the first blade and the other endmounted to the second blade and supporting the second blade in ahorizontal direction, wherein the coil member receives external power asan end of the first coil member is electrically connected with theconductor layer of the first elastic member, and the second coil memberreceives the external power as an end of the second coil member iselectrically connected with the other end of the second elastic memberand one end of the second elastic member is electrically connected withthe conductor layer of the first elastic member.
 5. The photographydevice of claim 1, wherein an upper side of the first blade is formedwith a through hole in which the magnet is penetratively inserted whenthe first blade moves up and down.
 6. The photography device of claim 1,further comprising: a yoke member which is in contact with the magnet,wherein the magnet includes a first magnet which is in contact with anupper surface of the yoke member and a second magnet which is in contactwith a lower surface of the yoke member, and polarities of the firstmagnet and second magnet are formed in an up and down direction suchthat the polarities are disposed symmetrically in the up and downdirection, and the yoke member has one surface disposed towards thefirst coil member and the other surface disposed towards the second coilmember.
 7. The photography device of claim 6, wherein the yoke member isformed with a magnetism inducement projection which projects towards thesecond coil member and inserted in a center of the second coil memberand the magnetism inducement projection induces the magnetic field ofthe magnet towards the second coil member.